本文選題：裝配式空心板橋　切入點(diǎn)：鉸縫　出處：《北京交通大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：裝配式空心板橋是我國(guó)中小跨徑橋梁的主要結(jié)構(gòu)形式,以山西省為例空心板橋約占該省全部中小跨徑梁橋的81.8%。隨著時(shí)間的推移,大量裝配式空心板橋顯現(xiàn)出許多相似的病害,以鉸縫損壞開(kāi)裂、板橋橫向整體性降低最為突出,有的甚至影響到橋梁的安全運(yùn)營(yíng)。為此,有必要在充分了解裝配式空心板橋的使用現(xiàn)狀基礎(chǔ)上,對(duì)常見(jiàn)主要病害進(jìn)行針對(duì)性研究。 本文首先對(duì)山西省現(xiàn)役的2510座裝配式空心板橋的調(diào)查數(shù)據(jù)進(jìn)行分析,掌握了空心板橋的設(shè)計(jì)荷載等級(jí)、橋梁跨徑、結(jié)構(gòu)類(lèi)型之間的內(nèi)在聯(lián)系及空心板橋的典型病害、現(xiàn)有加固方法,發(fā)現(xiàn)鉸縫病害是影響該類(lèi)型橋梁安全性的主要因素之一。其次,借助Abaqus有限元軟件建立常見(jiàn)10m跨裝配式簡(jiǎn)支空心板梁橋線彈性模型,分析鉸縫內(nèi)部及鉸縫與板梁接觸面的應(yīng)力隨荷載橫向、縱向移動(dòng)時(shí)的變化規(guī)律;而后建立10m跨裝配式簡(jiǎn)支空心板梁橋鉸縫結(jié)構(gòu)的非線性模型,在結(jié)構(gòu)最不利加載位置(橋梁1/2跨和1/8跨處)進(jìn)行加載直至結(jié)構(gòu)破壞,并分別分析有橋面鋪裝和無(wú)橋面鋪裝時(shí)鉸縫應(yīng)力隨荷載變化的發(fā)展規(guī)律。接著,以《公路橋涵標(biāo)準(zhǔn)圖》中10m跨鋼筋混凝土橋和13m、16m跨預(yù)應(yīng)力混凝土橋?yàn)閷?duì)象進(jìn)行橋面鋪裝改造、板底張拉橫向預(yù)應(yīng)力、板底粘錨鋼橫梁和鉸縫壓力注膠4種提高空心板橋橫向整體性加固方法的對(duì)比分析,并借助Midas有限元軟件對(duì)各加固方法的可行性進(jìn)行驗(yàn)算。 彈性分析表明：縱向剪應(yīng)力τ1的控制位置在1/8跨度附近的鉸縫內(nèi)部：鉸縫內(nèi)部和接觸面的豎向剪應(yīng)力τ2數(shù)值相近,最不利加載位置在跨中近鉸縫處；法向應(yīng)力σn的最不利加載位置與τ：相同。非線性分析表明：鉸縫下部側(cè)面為結(jié)構(gòu)最薄弱位置,最易出現(xiàn)法向粘結(jié)失效；鉸縫內(nèi)上部位置容易出現(xiàn)縱向剪切破壞現(xiàn)象；鉸縫中部側(cè)面是鉸縫結(jié)構(gòu)的主要傳力部位,結(jié)構(gòu)荷載的傳遞主要由鉸縫中部側(cè)面的豎向剪切強(qiáng)度、法向粘結(jié)強(qiáng)度及橋面鋪裝共同承擔(dān)。4種加固方法的對(duì)比發(fā)現(xiàn)：橋面鋪裝改造是常見(jiàn)的有效改善結(jié)構(gòu)橫向整體性的方法,但不同跨徑橋梁的合理鋪裝層厚度不同。靜載試驗(yàn)表明,橋面鋪裝改造可以有效提高裝配式空心板橋橫向整體性。
[Abstract]:The fabricated hollow slab bridge is the main structural form of the middle and small span bridges in China. Taking Shanxi Province as an example, the hollow slab bridge accounts for about 81.8% of all the small and medium-sized span beam bridges in the province. With the passage of time, a large number of fabricated hollow slab bridges show many similar diseases. The cracking of hinged joints makes the transverse integrity of the slab bridge most prominent, and some even affect the safe operation of the bridge. Therefore, it is necessary to fully understand the present situation of the use of the fabricated hollow slab bridge. The main diseases were studied. In this paper, the investigation data of 2510 prefabricated hollow slab bridges in Shanxi Province are analyzed, and the design load grade, bridge span, structural type and typical diseases of hollow slab bridges are grasped. Existing reinforcement methods have found that hinge joint disease is one of the main factors affecting the safety of this type of bridge. Secondly, the linear elastic model of 10m span simple supported hollow slab girder bridge is established by Abaqus finite element software. The variation of stress in hinge joints and the interface between hinged joints and slab beams with transverse and longitudinal loads is analyzed, and then the nonlinear model of hinged joints of 10m span prefabricated hollow slab girder bridges is established. At the most unfavorable loading position of the structure (1 / 2 span and 1 / 8 span of the bridge), the structure is subjected to loading until the structure is destroyed, and the evolution of the stress of hinged joints with and without deck pavement is analyzed respectively. Taking the 10m span reinforced concrete bridge and the 13m span prestressed concrete bridge as the objects, the bridge deck is paved, and the slab is prestressing with the transverse tension at the bottom of the slab, the concrete bridge with 10 m span and the prestressed concrete bridge with 13 m span span is taken as the object. The comparison and analysis of four methods to improve the transverse integrity of hollow slab bridge are carried out by means of Midas finite element software, and the feasibility of each reinforcement method is verified by means of Midas finite element software. The elastic analysis shows that the control position of longitudinal shear stress 蟿 1 is near 1 / 8 span, the vertical shear stress 蟿 2 in the joint and the contact surface is similar, and the most unfavorable loading position is near the hinge joint. The most unfavorable loading position of normal stress 蟽 n is the same as 蟿: the nonlinear analysis shows that the bottom side of the hinge joint is the weakest position of the structure, and the normal bond failure is the most likely, and the longitudinal shear failure is easy to occur in the upper part of the hinge joint. The middle side of the hinge joint is the main force transfer part of the hinged joint structure, and the load transfer of the structure mainly depends on the vertical shear strength of the middle side of the hinge joint. The comparison of normal bond strength and bridge deck pavement reinforcement methods shows that the bridge deck pavement reconstruction is a common and effective method to improve the transverse integrity of the structure, but the reasonable pavement thickness of different span bridges is different. The static load test shows that the bridge deck pavement reconstruction is a common and effective method to improve the transverse integrity of the structure. The improvement of deck pavement can effectively improve the transversal integrity of the assembled hollow slab bridge.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U445.72

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 趙卓;蔣曉東;霍達(dá);;基于破壞荷載試驗(yàn)的預(yù)應(yīng)力混凝土空心板單板受力分析[J];北京工業(yè)大學(xué)學(xué)報(bào);2007年05期

2 張耀宏;使用體外預(yù)應(yīng)力工法的橋梁加固設(shè)計(jì)──御坂橋的加固設(shè)計(jì)和實(shí)橋試驗(yàn)[J];國(guó)外橋梁;1999年04期

3 盛昌;周群美;陳曉剛;;某市政橋梁鉸縫構(gòu)造病害防治[J];工業(yè)建筑;2010年S1期

4 高崇明;楊明松;;橋梁養(yǎng)護(hù)的“新視角”[J];中國(guó)公路;2013年14期

5 張勁;王慶揚(yáng);胡守營(yíng);王傳甲;;ABAQUS混凝土損傷塑性模型參數(shù)驗(yàn)證[J];建筑結(jié)構(gòu);2008年08期

6 陳曉強(qiáng),趙佳軍,吳建平;板梁結(jié)構(gòu)由鉸縫引起的病害分析及加固改造[J];現(xiàn)代交通技術(shù);2004年01期

7 姜云霞,柴金義,伍必慶,王志遠(yuǎn),王雙才,劉永祥;不中斷交通實(shí)施鉸接板橋加固的研究[J];內(nèi)蒙古公路與運(yùn)輸;2002年02期

8 彭以舟,張永新;南港大橋空心板病害維修與加固[J];皖西學(xué)院學(xué)報(bào);2001年04期

9 許國(guó)平;;空心板橋橋面鋪裝對(duì)主梁受力性能影響分析[J];公路工程;2012年03期

，

本文編號(hào)：1649213